Tool for dressing cement surfaces



Jan. 30, 1951 KNIGHT v 2,539,629

TOOL FOR DRESSING CEMENT SURFACES Filed Sept. 15, 1948 ATTO R N EYPatented Jan. 30, 1951 UNITED STATES PATENT" OFFICE TOOL FOR DRESSINGCEMENT son-moss Lewis Albert Knight, Baltimore, Md.

Application September 15, 1948, Serial No. 49,365

4 Claims.

This invention relates to tools for dressing cement surfaces and hasparticular reference to devices of this character for dressing andsmoothing artificial stone wall facings.

In my U. S. Patents Nos. 2,095,641 and 2,095,642 and in my ReissuePatent No. 20,985, there are described the methods for making artificialstone facings from cementitious material in plastic form and theformation of furrows or grooves in the outer plastic cementitiousmaterial, in simulation of mortar joints on the surfaces of stonestructures.

Among the objects of this invention is the provision of a dressing toolfor specific use at the simulated mortar joints of the artificial stonewalls facings so that the desired dressing and smoothing of thesesimulated mortar joints may be performed with greater ease, facility andefficiency than that accomplished by the tools heretofore used for thisand similar purposes.

A further object of this invention is to provide a dressing tool of suchcharacter, whereby the appearance of the simulated mortar joints of theartificial stone wall facings may be en- 2 and 26, respectively,extending toward the rear of the head.

I prefer to make the middle groove portion Ii! substantiallysemi-cylindric thereby providing a wall of substantially semi-circularcross section. The surfaces 56 and I8 of the wings are curved to 'anextent so that the fiat tangential surfaces 29 and 22 are flared awayfrom the plane passing through the outer edges of the middle grooveportion.

With a dressing tool having the foregoing novel construction andfeatures, an operator can dress and finish the tops, bottoms and sidesof grooves, furrows and simulated mortar joints on the artificial stonefacings of cementitious material very readily and effi-ciently and canalso do this work in difficultly accessible and juction with theaccompanying drawing where- Fig. l is a side elevation of a specificembodiment of my invention.

Fig. 2 is a top plan view of the device shown in Fig. 1.

Fig. 3 is a bottom plan view of the device shown in Fig. 1.

Fig. 4 is a front end elevation of the device shown in Fig. 1.

Fig. 5 is a section along line 55 of Fig. 1.

Fig. 6 is a section along line 6-43 of Fig. 1.

My new device comprises the head 2 connected by its shank 4 to thehandle 6. The shank 4 is preferably soldered to the rear 8 of the head2.

The tool proper comprises the trisulcated head having the middle grooveportion Ill and the grooved wings I2 and I 4 connected to and ex--tending from the middle portion 10. These wings I2 and I4 have curvedsurfaces 55 and i8, respectively, contiguous to the middle portion I!)and the remaining tangential surfaces 20 and 22, respectfully, aresubstantially fiat. The wings I? and I4 have the raked edges 24restricted locations where prior dressing tools could not heretofore beused.

The present invention is not limited to the specific details set forthin the foregoing examples which should be construed as illustrative andnot by Way of limitation and, in view of the numerous modificationswhich may be effected therein without departing from the spirit andscope of this invention, it is desired that only such limitations beimposed as are indicated in the appended claims.

I claim as my invention:

1. A tool for dressing cement surfaces, said tool comprising a sulcatedhead with a smoothing face having an elongated middle groove portion andgrooved wings connected to and extending from the edges of the middlegroove portion, each of said wings having the surface contiguous to saidmiddle portion concavely curved and the remaining surface tangential tothe concavely curved portion and substantially flat, said wings beingraked with the side edge of each wing sloping inwardly toward the rearof said head.

2. The tool claimed in claim 1, wherein the middle groove portion issubstantially semi-cylindric and the substantially flat portions of theWing are flared away from the plane through the outer edges of saidmiddle groove portion.

3. A tool for dressing cement surfaces, said tool comprising atrisulcated head with a smoothing face having an elongated middle grooveportion and grooved wings connected to and extending from the edges ofthe middle groove portion, each of said wings having the surfacecontiguous to said middle portion concavely curved and the remainingsurface tangential to the concavely curved portion and substantiallyflat, said wings being raked with the side edge of each wing slopinginwardly toward the rear of said head.

4. The tool claimed in claim 3, wherein the middle groove portion issubstantially semi-cylindric and the substantially fiat portions of thewings are flared away from the plane through the outer edges of saidmiddle groove portion.

4 REFERENCES CI'IIED The following references are of record in the fileof this patent:

UNITED STATES PATENTS Number Name Date 1,142,022 Chappell June 8, 19151,327,151 Frazier Jan. 6, 1920 FOREIGN PATENTS Number Country Date457,061 Great Britain Nov. 20, 1936

